Rashanda McCants scored 17 points and No. 2 North Carolina rallied for an 83-74 victory over Clemson on Thursday night to improve to 15-0. The Tar Heels (1-0 Atlantic Coast Conference) had played just twice in the past three weeks and it showed as they watched Clemson (10-5, 1-1) overcome a 12-point defict and take a 65-64 lead with 5:03 to go.